lxdrgen: fix decapitalization

decapitalize() is typically called on snaketocamel() output,
which always makes the first letter uppercase.

CMakeLists.txt

@@ -1,5 +1,5 @@
-project (liberty C)
 cmake_minimum_required (VERSION 2.8.12)
+project (liberty C)
 
 # Moar warnings
 if ("${CMAKE_C_COMPILER_ID}" MATCHES "GNU" OR CMAKE_COMPILER_IS_GNUCC)

liberty-xui.c

@@ -47,9 +47,9 @@
 #include <unicase.h>
 
 #include <termios.h>
-#ifndef TIOCGWINSZ
+#ifdef HAVE_RESIZETERM
 #include <sys/ioctl.h>
-#endif  // ! TIOCGWINSZ
+#endif  // HAVE_RESIZETERM
 
 // ncurses is notoriously retarded for input handling, and in past versions
 // used to process mouse events unreliably.  Moreover, rxvt-unicode only

tools/lxdrgen.awk

@@ -1,6 +1,6 @@
 # lxdrgen.awk: an XDR-derived code generator for network protocols.
 #
-# Copyright (c) 2022, Přemysl Eric Janouch <p@janouch.name>
+# Copyright (c) 2022 - 2023, Přemysl Eric Janouch <p@janouch.name>
 # SPDX-License-Identifier: 0BSD
 #
 # Usage: env LC_ALL=C awk -f lxdrgen.awk -f lxdrgen-{c,go,mjs}.awk \
@@ -28,9 +28,10 @@ function snaketocamel(s) {
 }
 
 function decapitalize(s) {
-	if (match(s, /[[:upper:]][[:lower:]]/)) {
+	if (match(s, /^[[:upper:]][[:lower:]]/))
 		return tolower(substr(s, 1, 1)) substr(s, 2)
-	}
+	if (match(s, /^[[:upper:]]$/))
+		return tolower(s)
 	return s
 }